kern/85780: 'panic: bogus refcnt 0' in routing/ipv6

[Kris Kennaway]

The following reply was made to PR kern/85780; it has been noted by GNATS.

From: Kris Kennaway <kris at obsecurity.org>
To: Kris Kennaway <kris at FreeBSD.org>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/85780: 'panic: bogus refcnt 0' in routing/ipv6
Date: Wed, 7 Sep 2005 02:16:59 -0400

 On Tue, Sep 06, 2005 at 04:00:34AM +0000, Kris Kennaway wrote:
 
 > This panic occurred on an SMP sparc64 machine.
 > 
 > > panic: bogus refcnt 0
 > > cpuid = 0
 > > KDB: enter: panic
 > > [thread pid 15 tid 100003 ]
 > > Stopped at      kdb_enter+0x3c: ta              %xcc, 1
 > > db> wh
 > > Tracing pid 15 tid 100003 td 0xfffff8001fb75680
 > > panic() at panic+0x164
 > > rtfree() at rtfree+0x7c
 > > nd6_na_output() at nd6_na_output+0x4d0
 > > nd6_ns_input() at nd6_ns_input+0x704
 > > icmp6_input() at icmp6_input+0xc38
 > > ip6_input() at ip6_input+0xf5c
 > > netisr_processqueue() at netisr_processqueue+0x7c
 > > swi_net() at swi_net+0xdc
 > > ithread_loop() at ithread_loop+0x18c
 > > fork_exit() at fork_exit+0x94
 > > fork_trampoline() at fork_trampoline+0x8
 
 I have a core from this panic.  I also got another one on a different
 machine:
 
 panic() at panic+0x164
 rtfree() at rtfree+0x7c
 nd6_ns_output() at nd6_ns_output+0x48c
 nd6_timer() at nd6_timer+0x244
 softclock() at softclock+0x22c
 ithread_loop() at ithread_loop+0x18c
 fork_exit() at fork_exit+0x94
 fork_trampoline() at fork_trampoline+0x8
 
 (core also available).
 
 Kris